Auxiliary air admission valve



Oct. 12, 1943.

J. R. HALL AUXILIARY AIR ADMISSION VALVE Original Filed April' 22, 1939l gru/UWM Joseph Yi. Hall @ZM u WITNESS 51" 1J) MM Patented Oct. 12,1943 l f i i I A ,l t

substituted for abandoned application Serial No. .269,463,y April22,1939. This application July. ,31, 1943,\Serial l\lo.` 496,918 y l l 1claim. (c1. zii-29)l Y This application is a substitute or duplicate ofU ward adjustment of the nipple 6..will.adjustrth'e'.E my abandonedapplication .Serial No. 269,463, strength of saidspring to.' permitproperuinitia'l filed Apr1l 22, 1939 and allowed Mayll, 1940.adjustments `of thedevce.wheninstallingitfuponr The `inventionaims toprovide a simple, ini an engine. y v expensive and efficient device foradmitting aux- The valve I2 is of the piston type, said valve `iliaryair to the intake manifold of an internal being slidable in the endportion of the cylinder 3 combustion engine (primarily an automobilewhich is provided with the seat 5. A portion I3 engine) whenever theengine is operating with of this valve projects beyond the cylinder,'and the throttle valve open to apredetermined extent, said valve isprovided with a port I4 shown in and for prohibiting admission of suchair whenthe form of a T, said port extending from the ever said throttlevalve is closed beyond said preperiphery of said portion .I3 through theinner determmed extent. Thus, a saving in fuel may end of the valve I2.A conventional needle valve be effected at ordinary running speed, butadmis- I5 has been illustrated for controlling the con- -K sion o f airat lower or idling speed prohibited so ducting capacity of the port.that 1t cannot interfere with smooth engine 15 The outer'end of thevalve I2 isv provided with operation. an annular lateral flange I6constituting a valve A further object of the invention is to provide forcoaction with the seat 5; when the piston a device of the classdescribed which is entirely valve I2 is drawn inwardly by suflicientsuction automatic, the air-admission valve being held in in the intakemanifold, thereby prohibiting enopen position by a spring at runningspeeds and trance vof air through the port I4, the cylinder being drawnto a closed position by the increased I3 and the nipple 6 to themanifold. To limit suction in the intake manifold when the throttle theoutward movement of the valve under the valve is closed beyond apredetermined extent. influence of the spring II, a stop screw Il hasWith the foregoing in view, the invention rebeen shown, threaded throughthe cylinder Wall, sides in the novel subject matter hereinafter theinner end of said stop screw being receivable described and claimed,description being accomin an annular channel I8 formed in the body ofplished by reference to the accompanying draw the valve. The peripheryof this valve is prefing. Y erably formed with an annular groove I9 tore- Figure 1 is a perspective View illustrating the ceive graphite orother lubricant, and the innerv application of the invention. end ofsaid valve may well be provided with a Figure 2 is an enlargedlongitudinal sectional recess 2li receiving the outer end of the springIl. View. To install the device, the nipple 6 is tapped A preferredconstruction has been selected into the intake manifold at a pointbetween the for illustration and will be rather specifically deusualthrottle valve and the intake valves of the scribed, with theunderstanding, however, that engine. Then, by threading thenipple 6 agreatminor variations may be made within the scope er or lesser distanceinto the cylinder 3, the of the invention as claimed. strength of lthespring II may be so adjusted as A cylinder 3 is provided having athreaded to cause said spring to hold the valve i2 against opening 4 inone end, the other end of said closingat ordinary running speeds, thevacuum cylinder being suitably shaped, for example, as il- 40 within theintake manifold being then relatively lustrated lat 5, to provide avalve seat. A nipple weak due to the fact that the throttle valve is 6is threaded through the opening 4 and may be then opened to a relativelygreat extent. Thus,

adjusted to extend a greater or lesser distance at running speeds,auxiliary air will be supplied into said cylinder for a purpose toappear, a to the engine cylinders to effect-a saving in fuel. lock nut'I being shown for relatively locking the 45 Whenever the throttle valveis closed beyond a nipple and cylinder after adjustment of theVpredetermined extent, for instance, to idle the former. engine, the.vacuum within the intake manifold An air screen 8 is shown labuttingthe inner end becomes much stronger, with the result that the of thenipple 6, and I have shown a disk 9 lying spring I I can no longerresist the inward pull against the inner side of said spring, said diskexerted by said vacuum upon the valve I2. Conhaving a single aperture I6or a plurality of apersequently, this valve slides inwardly against thetures. This disk forms an abutment for the inner action of the spring IIuntil the flange I6 seats i end of a coiled compression spring II whichnorupon the seat 5, thereby prohibiting entrance of mally holds the airadmission valve I2 'in open auxiliary air foridlng or relatively lowspeeds position, and it will be seen that inward or outand consequentlyinsuring that the ldevice shall not interfere with smooth engineoperation at such speeds.

From the foregoing, taken in connection with the accompanying drawing,it will be seen that novel and advantageous provision has been made forcarrying out the objects of the invention. While preferred details havebeen illustrated, attention is again invited to the possibility ofmaking minor variations within the scope of the invention as claimed.

Furthermore, while I have illustrated the valve associated with anengine in which the intake manifold extends upwardly from thecarbureter, it will be understood that it is equally applicable toengines having down-draught carbureters.

I claim:

An auxiliary air admission device comprisingra cylinder having means atone end for placing it in communication with an intake manifold, theother end of said cylinder being open and provided with an outwardlyfacing valve seat, a pis ton slidable in said cylinder and having arecess in its inner extremity, said piston having an outer end portionprojecting beyond said open end of CTI said cylinder, said projectingpiston portion having a peripheral flange normally spaced outwardly fromsaid valve seat, said piston being provided with a wide peripheralgroove having a. portion of its width disposed beyond said open end ofsaid cylinder when the iiange is spaced from said seat and the remainderof its width within said cylinder, the periphery of said piston beingalso provided between the inner end of said piston and said wide groovewith a shallow lubricant groove, said piston having a T-shaped airadmission port extending from diametrically opposite points inthe bottomof said wide groove into said recess in-the inner extremity of saidpiston, a screw threaded into the outer extremity of said piston andextending into said T-shaped port to

